Sends the SQL query in the body with a PUT request
Stores the free_text filters + stores the list_view option + fixes specs
Merge branch 'develop' of github.com:CartoDB/cartodb20 into develop

* 'develop' of github.com:CartoDB/cartodb20:
  Fixes importer issues
  Removes some legacy code and fixes user spec
  Removes export specs
  Fixes error when importing csv files with the_geom columns
  relocator fixes from staging
  clean up staging hotfixes
  fixes from staging
  Default purge command change to 'purge'